JPH11320780A - Multilayered film and self-adhesive tape using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a multilayered film base material for a self-adhesive tape having a satin-like surface, excellent in productivity and having a flexible feeling and proper stiffness/strength and the self-adhesive tape using this base material. SOLUTION: A multilayered film is obtained by providing an intermediate layer (B) based on one or more kind of a resin selected from a group consisting of polypropylene, a polyolefinic thermoplastic elastomer and a styrenic thermoplastic elastomer between an upper layer (A) based on polypropylene and containing a polyolefinic thermoplastic elastomer and a lower layer (C) based on polypropylene and containing one or more kind of a resin selected from a group consisting of a polyolefinic thermoplastic elastomer, a styrenic thermoplastic elastomer and a linear low density polyethylene.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is characterized in that at least one surface is modified into a satin pattern by blending polypropylene and a specific polyolefin-based thermoplastic elastomer without performing physical processing such as embossing rolls. The present invention relates to a multi-layer film substrate having productivity, soft texture, moderate waist and strength, and a pressure-sensitive adhesive tape using the same, which is used as a base material for an adhesive tape used in paper diapers and the like.

[0002]

2. Description of the Related Art A base material for an adhesive tape used in disposable diapers has a soft waist and a tape, which are safe from the cut and rash caused by touching the baby's skin, have a soft texture, and are easy to attach. Tear resistance is required to prevent tape breakage during peeling. Also, due to the texture of the appearance, a matte tone with reduced surface shine is preferred. Further, at the time of tape production, heat resistance and slit processability of the film base are also required at the same time.

Conventionally, Japanese Patent Publication No. 2569035 discloses a pressure-sensitive adhesive tape formed of a polymer obtained by blending polypropylene and an ethylene-based polymer in a specific blend, and using a film having limited physical properties. It is described as being flexible, adaptable, and heat sealable. However, such a film is excellent in flexibility, but it is difficult to apply the adhesive because the film is easily stretched due to heat dripping during the production of the adhesive tape, or it is easy to generate a winding deviation after slitting into a roll shape. Was. In the diaper manufacturing process,
Since the tape was easily stretched when tension was applied, it was inferior in tape running property and could not be accurately adhered to a diaper. Furthermore, when this adhesive tape is used as a fastening tape for disposable diapers,
When the fastening tape is peeled off from the adhesive surface protection surface of the release tape, the tape is curled, resulting in a poor hand-held feeling and a poor diaper mountability.

[0004] In addition, Japanese Utility Model Registration No. 2541898 describes that processing the upper surface in a slightly satin-like shape is preferable because the softness and weight are increased. However, the processing method is a known physical processing method such as embossing roll or sand blast. In this method, in order to obtain sufficient satin finish, a reduction in production speed is inevitable, and it is difficult to reduce costs in terms of productivity. Furthermore, in order to improve flexibility, hand, and tearability, a multilayer film in which a blend layer of polypropylene and an ethylene-based polymer and a single layer of either polypropylene or an ethylene-based polymer is laminated is disclosed. However, as in Comparative Examples 1 and 2, when a single layer of ethylene / vinyl acetate copolymer was laminated as the upper layer and a blend layer of polypropylene / low density polyethylene = 70/30 was laminated as the lower layer, the interlayer adhesion between the upper layer and the lower layer Is insufficient, and easily peels between layers when heat-sealing the film, or when the adhesive tape is processed to have a strong adhesive force or is roughly handled, which is inconvenient as a film and a tape.

Further, when the film is used as a base material for a paper diaper tape or an adhesive tape, an adhesive is applied on at least one surface. At this time, if the solvent resistance of the coated surface is inferior, curling or sagging occurs in the film, which causes a problem in appearance and in slitting the tape or manufacturing diapers. Patent Publication No. 2569035 or Utility Model Registration Publication No. 254
No. 1898, low-density polyethylene (LDPE), ultra-low-density polyethylene (VLDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer ( EA
A) and the like. In the case of blending the ethylene-based polymer, curl and sagging may occur when the adhesive is applied, and in the case of blending EVA, a gel may be generated due to thermal degradation in a recycling process during film production. is there. In addition, when EAA is blended, the compatibility with polypropylene is poor, and a gel is easily generated at the time of blending or recycling.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to use a film characterized in that at least one surface is modified into a satin finish without physical processing such as an embossing roll, and the productivity is improved. Another object of the present invention is to provide a multi-layer film base material for an adhesive tape having a soft feel, a moderate waist and strength, and an adhesive tape using the base material.

[0007]

Means for Solving the Problems According to the present invention, as a result of intensive studies to solve the above problems, the surface layer is modified into a satin shape by blending a specific polyolefin-based thermoplastic elastomer as a soft component with polypropylene. Further, the multi-layered structure realizes a soft feel, stiffness, tear resistance, and good workability during tape production suitable for an adhesive tape such as a disposable diaper, thereby completing the present invention.

That is, a first structure of the present invention comprises an upper layer (A) containing polypropylene as a main component and a polyolefin thermoplastic elastomer, a polypropylene as a main component, a polyolefin thermoplastic elastomer, and a styrene thermoplastic elastomer. Between the lower layer (C) containing at least one resin selected from the group consisting of an elastomer and a linear low-density polyethylene, one kind selected from the group consisting of a polypropylene, a polyolefin-based thermoplastic elastomer, and a styrene-based thermoplastic elastomer A multilayer film comprising an intermediate layer (B) containing the above resin as a main component.

The present invention is also a polyolefin-based thermoplastic elastomer wherein the above-mentioned polyolefin-based thermoplastic elastomer has polyethylene or polypropylene as a hard segment and ethylene-propylene rubber or ethylene-propylene-diene terpolymer as a soft segment. Including multilayer films.

A second structure of the present invention comprises an upper layer (A) containing polypropylene as a main component and a polyolefin thermoplastic elastomer, and a polypropylene as a main component,
Lower layer (C) containing at least one resin selected from the group consisting of a polyolefin-based thermoplastic elastomer, a styrene-based thermoplastic elastomer, and a linear low-density polyethylene.
A pressure-sensitive adhesive layer on the lower layer side of a multilayer film in which an intermediate layer (B) containing at least one resin selected from the group consisting of a polypropylene, a polyolefin-based thermoplastic elastomer and a styrene-based thermoplastic elastomer as a main component is provided. (D)
It is an adhesive tape characterized by having.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, each part of the configuration will be described in detail. The polypropylene of the upper layer (A) may be either a propylene homopolymer or an ethylene / propylene copolymer. When the coalescence is required to have a feeling and flexibility, an ethylene-propylene copolymer is preferred. The ethylene content in the ethylene / propylene copolymer is preferably from 1 to 10% by weight in consideration of a decrease in rigidity, strength, and workability.

The surface layer of the upper layer (A) is modified into a satin finish by blending a polypropylene with a polyolefin-based thermoplastic elastomer. As the polyolefin-based thermoplastic elastomer, a resin having a hard segment of polyethylene or polypropylene and a soft segment of an olefin-based rubber of ethylene propylene rubber (EPR) or ethylene propylene diene terpolymer (EPDM) can be used.

The polyolefin-based thermoplastic elastomer may be any of a simple blend type, a dynamically crosslinked type, and an implant type. However, in terms of compatibility with polypropylene and cost, an implant copolymer type of polypropylene and ethylene / propylene rubber is used. preferable. In order to obtain the satin effect, the content of EPR in the polyolefin-based thermoplastic elastomer is preferably 40 to 70%. The amount of the upper layer (A) added to the polypropylene is
1 to 50% by weight is preferred. If it is less than 1%, a sufficient satin finish cannot be obtained, and if it exceeds 50%, the feel, flexibility and tear resistance are excellent, but the drop in waist is large and the workability during tape production is poor. The melting point is preferably 140 ° C. or higher, but more preferably 150 ° C. or higher from the viewpoint of maintaining the heat resistance during tape production for use in the surface layer.

As the intermediate layer, any one of polypropylene, polyolefin-based thermoplastic elastomer and styrene-based thermoplastic elastomer may be used as a single layer, or a blend layer of any two or more of them may be used. Further, the number of layers is not limited to one, and a plurality of layers may be used.

For example, when the matte feeling of the upper layer is strongly required, the blend amount of the polyolefin-based thermoplastic elastomer increases, and the feeling increases but the stiffness of the film decreases. At this time, by providing the intermediate layer with the polypropylene resin layer, the lowering of the stiffness can be compensated, and the workability during tape production can be maintained. When a plurality of intermediate layers are provided, by using a polyolefin-based thermoplastic elastomer or a styrene-based thermoplastic elastomer for one intermediate layer, flexibility, texture, and tear resistance are improved, and a polypropylene resin is used for other intermediate layers. By using it, both the rigidity and heat resistance required during tape production can be achieved. Further, depending on the blend amount of the upper layer polyolefin thermoplastic elastomer, the intermediate layer is mainly composed of polypropylene so as to have the necessary texture, waist, tear resistance, workability, etc. of the entire film, and the polyolefin thermoplastic elastomer and It may be one or more blend layers selected from styrene-based thermoplastic elastomers.

The polypropylene and the polyolefin-based thermoplastic elastomer of the intermediate layer may be the same as those described above. However, the polyolefin-based thermoplastic elastomer is effective in providing a soft effect such as improvement in flexibility, feeling, and tear resistance. In order to obtain a low melting point, a low melting point type of 105 ° C to 145 ° C is preferable. The styrene-based thermoplastic elastomer is not particularly limited, but a hydrogenated styrene-based thermoplastic elastomer having good compatibility with a polyolefin-based resin and excellent heat stability at the time of molding and environmental stability is preferable. For example, those obtained by hydrogenating a styrene / butadiene block copolymer or those obtained by hydrogenating a styrene / butadiene random copolymer can be suitably used.

When the film of the present invention is used as a base material for a disposable diaper tape or pressure-sensitive adhesive tape, the coated surface of the pressure-sensitive adhesive must have solvent resistance. At this time, the layer (lower layer) corresponding to the coated surface of the pressure-sensitive adhesive is mainly composed of polypropylene and contains at least one resin selected from the group consisting of a polyolefin-based thermoplastic elastomer, a styrene-based thermoplastic elastomer, and a linear low-density polyethylene. This makes it possible to suppress a decrease in solvent resistance while maintaining flexibility and texture.

The same polypropylene as the surface layer and the intermediate layer may be used as the polypropylene as the main component of the lower layer. The same polyolefin-based thermoplastic elastomer as the surface layer and the intermediate layer can be used, but a type in which polypropylene having excellent solvent resistance is used as a hard segment is preferable. As with the surface layer, in terms of compatibility with the main component polypropylene and cost, polypropylene and E
From the viewpoint of maintaining the heat resistance at the time of tape production, those having a melting point of 140 ° C. or higher are more preferable.

As the styrene-based thermoplastic elastomer, those similar to the intermediate layer can be used. The linear low-density polyethylene is not particularly limited, but has a density of 0.90 from the viewpoint of good solvent resistance and an effect as a soft component.
A linear low-density polyethylene having 0 to 0.925 g / cm 3, a melting point of 85 ° C. or higher, and a melt flow rate of 3 to 8 g / 10 min is preferable. The addition amount of the polyolefin-based thermoplastic elastomer, the styrene-based thermoplastic elastomer and the linear low-density polyethylene is not particularly limited, and depends on the addition amounts of the soft components of the upper layer and the intermediate layer.
What is necessary is just to determine suitably from the feeling of the whole film, and the balance of the waist. However, if the content is 1% or less, the solvent resistance is excellent but the soft effect is low, and if the content is 50% or more, the solvent resistance and the lowering of the waist become large. However, when a styrene-based thermoplastic elastomer is compounded, the surface stickiness increases with an increase in the amount of addition, so that the content is more preferably 1 to 40% by weight. In order to maintain interlayer adhesion, the content is more preferably 1 to 30% by weight.

The modulus of the film of the present invention is not particularly limited, but the longitudinal and transverse secant modulus is preferably 3500 to 6000 kg / cm 2 (more preferably 3600 to 5000 kg / cm 2), and the elastic modulus is preferably It is preferably 4000 to 7500 kg / cm2 (more preferably 4500 to 5500 kg / cm2). If the secant modulus is less than 3500 kg / cm2 or the elastic modulus is less than 4000 kg / cm2,
Tape productivity, slitting processability, and diaper productivity deteriorate. If the secant modulus exceeds 6000 kg / cm 2 or the elastic modulus exceeds 7500 kg / cm 2, the soft hand of the tape is impaired.

The total thickness of the film of the present invention is not particularly limited, but is preferably 30 to 200 μm. The thickness of each layer is preferably 5 to 40% of the total thickness of the surface layer (upper layer) to be modified into a satin finish, and 5 to 50% of the total thickness of the lower layer requiring solvent resistance. The middle layer is
What is necessary is just to determine suitably after determination of an upper layer and a lower layer.

As the method for producing the film of the present invention, a method known as a technique for forming a plastic film may be used, but T-die coextrusion is more preferable.

The film of the present invention is also preferably used as a base material of an adhesive tape having at least one surface provided with a pressure-sensitive adhesive layer or a release tape having at least one surface provided with a release treatment. Although it is not intended to limit the present invention, the adhesive tape and the release tape for disposable diapers are preferably used as a fastening tape and a release tape (for protecting the adhesive surface).

The pressure-sensitive adhesive used in the present invention is not particularly limited, but is usually a rubber type obtained by blending a tackifier resin with a block copolymer or natural or synthetic rubber, or an acrylate copolymer. Etc. are used. Preferably, in an SIS block copolymer having a diblock amount of 30 to 80% and 40 to 70% by weight, and in an adhesive having a total tackifier resin of 60 to 30% by weight, 50% by weight or more of the total tackifier resin amount is not less than 50% by weight. An adhesive that is a C5 petroleum resin is used.

The film of the present invention may be subjected to a corona treatment or an ozone treatment on the upper surface or the lower surface thereof as required to improve the anchoring suitability of the pressure-sensitive adhesive and the release agent treatment suitability. The functionality may be enhanced by appropriately adding a heat stabilizer, an antioxidant, a light stabilizer, an ultraviolet absorber, a coloring agent and the like to the extent that the processing degree is not impaired. As these additives, those known for polyolefins may be used.

[0026]

EXAMPLES Preparation of Examples (Films) 1 to 5 Propylene homopolymer (HOPP, MFR = 9.0 g /
10 min, density = 0.90 g / cm3), ethylene
Propylene copolymer (COPP, MFR = 8.0 g / 1
0 min, density = 0.90 g / cm 3), polyolefin-based thermoplastic elastomer (TPO) [A] (polypropylene / EPR / implant copolymer, EPR component 5)
0%, MFR = 3.0, melting point = 162 ° C., density = 0.9
0 g / cm3), Polyolefin-based thermoplastic elastomer (TPO) [B] (polypropylene / EPR / implant copolymer, MFR = 7.0 g / 10 min, melting point = 142 ° C., density = 0.90 g / cm3), linear Low density polyethylene (LLDPE-1, MFR = 3.5 g / 1
0 min, density = 0.902 g / cm3) or (LL
DPE-2, density = O. 920 g / cm3), styrene / ethylene / butylene / styrene block copolymer (S
EBS, MFR = 8.0 g / 10 min, density = 0.9
9 g / cm @ 3, a styrene / rubber ratio = 13/87), and polypropylene / titanium dioxide (PP / TiO _2, MF
R = 7.0 g / 10 min, titanium dioxide concentration 50%)
Were prepared in the same manner as in Examples 1 to 5 of Table 1 to produce multilayer films.

Each layer from the upper layer to the lower layer is dry blended with each polymer and then extruded from an extrusion T die at an extrusion temperature of 250 ° C. onto a water-cooled metal cooling roll having a roughness of 7 μm. The cooling roll temperature was 30 ° C. in Example 1, Example 2
The temperature is 35 ° C. for 3 and 5, and 40 ° C. for Example 4. The contact time of the cooling roll is 4.6 seconds in each case. The cooled film surface is immediately treated and wound up by the usual corona discharge technique. The resulting film is aged in an aging room (35 ° C.) for at least 48 hours to reach equilibrium physical properties. Table 4 shows the properties of the ripened film.

[0028]

[Table 1]

[Preparation of Comparative Examples (Films) 1-3] Propylene homopolymer (HOPP, MFR = 9.0 g / 10
min, density = 0.90 g / cm 3), ethylene / propylene copolymer (COPP, MFR = 8.0 g / 10 m)
in, density = 0.90 g / cm 3), low density polyethylene (LDPE, MFR = 5.0 g / 10 min, density =
0.922 g / cm3) and ethylene / vinyl acetate copolymer (EVA, MFR = 2.4 g / 10 min, vinyl acetate content 25%, density = 0.949 g / cm3). The multilayer film was produced by the structure shown in No.-3.

The upper layer was used alone, and the lower layer was prepared by dry blending each polymer.
Comparative Example 2 was extruded at 240 ° C. from an extruded T-die onto a water-cooled metal cooling roll having a roughness of 7 μm. The cooling roll temperature was 40 ° C., and the cooling roll contact time was 4.6 seconds. The cooled film surface is immediately treated and wound up by the usual corona discharge technique. The resulting film is aged in an aging room (35 ° C.) for at least 48 hours to reach equilibrium physical properties. Table 5 shows the properties of the ripened film.

[0031]

[Table 2]

[Preparation of Comparative Examples (Films) 4 to 7] Propylene homopolymer (HOPP, MFR = 9.0 g / 10
min, density = 0.90 g / cm 3), ethylene / propylene copolymer (COPP, MFR = 8.0 g / 10 m)
in, density = 0.90 g / cm 3), ethylene / acrylic acid copolymer (EAA, MFR = 7.0 g / 10 mi)
n, acrylic acid content 11%, density = 0.940 g / cm
3) and ethylene / vinyl acetate copolymer (EVA, M
FR = 2.4 g / 10 min, vinyl acetate content 25%,
Each resin having a density of 0.949 g / cm3) was used in an amount shown in Comparative Examples 4 to 7 in Table 3 to prepare a single film.

After dry-blending each polymer shown in the upper layer, Comparative Examples 4 and 5 had an extrusion temperature of 250 ° C.
Were extruded from an extrusion T-die onto a water-cooled metal chill roll having a roughness of 7 μm at 240 ° C. and Comparative Example 7 at 260 ° C., respectively. The cooling roll temperature was 40 ° C., and the cooling roll contact time was 4.6 seconds. The cooled film surface is immediately treated and wound up by the usual corona discharge technique. The resulting film is aged in an aging room (35 ° C.) for at least 48 hours to reach equilibrium physical properties. After aging, the properties of the film
It is shown in Table 6.

[0034]

[Table 3]

[Evaluation Method] The evaluation method is shown below for each evaluation item. All the films for evaluation are set in an aging room (35 ° C.) in order to reach equilibrium in physical properties after film formation.
For at least 48 hours. In addition, at room temperature (23) to allow the physical properties to reach equilibrium prior to measurement.
° C) for at least 2 weeks.

(1) Secant modulus and elastic modulus: 25.3 mm × 150 mm (mark line interval 25.4 m)
Attach the film piece of m) to a tensile tester. Then pull apart at a speed of 254 mm / min until the yield point is reached.
Semantic modulus and elastic modulus are used to express the film properties of the present invention. Secant modulus is ASTM
Calculated by the method of D882 section 11.8. A tangent is drawn to the initial straight line portion of the load-elongation curve.
Tensile stress at 5% strain is calculated by dividing the load by the average cross-sectional area of the test specimen. Elastic modulus is calculated according to the method of ASTM D882 section 11.7. It is calculated by drawing a tangent to the initial straight line portion of the load-elongation curve, selecting an arbitrary point on this tangent, and dividing the tensile stress by the corresponding strain.

(2) Solvent resistance: Thoroughly applying toluene on the entire pressure-sensitive adhesive-coated surface (lower layer) of the film, immediately at 80 ° C.
Dry for 3 minutes in the dryer. After the film is dried, the state of wrinkles, tarmi and the like when the film is taken out is visually evaluated. A film having almost no change was represented by (○), a film having slight sagging was represented by (△), and a film having significant sagging and warpage was represented by (x).

(3) Tear strength: The film is cut into a width of 60 mm (CD direction) × a length of 60 mm (MD direction), and a cut of 30 mm is made from the center in the width direction (CD direction) parallel to the length direction (MD direction). Insert The cut notch is attached to the tensile tester and 500 until it is completely torn.
Separate at a speed of mm / min. The peak strength at this time was defined as the tear strength.

(4) Interlayer strength: 80 mm × 8 for film
Two pieces are cut to 0 mm, and the two pieces are overlapped so that the MD directions match and the upper layers match. One end of the two stacked films is heat-sealed with a heat sealer having a width of 10 mm at a temperature of 155 ° C. perpendicular to the MD direction. The obtained sample is cut to a width of 15 mm and attached to a tensile tester. Then the speed is 300mm / m until the film is completely released
Separate with in. At this time, when the adhesion between the layers was not sufficient and peeling occurred between the layers, the average value from that point until the film was completely separated was taken as the interlayer strength. Until the separation (cutting) of the film, when the layers were in good contact with each other and no delamination occurred between the layers, "cut" was added, and the peak value was shown as the layer sensitivity.

(5) Curl: The degree of tape peeling (curl) when the tape was attached to a paper diaper and peeled off from the release tape at the time of use was visually evaluated.

(6) Tape Productivity: In the process of producing a pressure-sensitive adhesive tape in which a pressure-sensitive adhesive is applied to a film, dried, and wound into a roll, wrinkles and elongation of the film were evaluated.

(7) Diaper productivity: In the tape pasting unit of the paper diaper manufacturing machine, after unwinding the tape,
The state of transport of the tape until it was mounted on the diaper body was visually evaluated.

(8) Texture of tape: 60 mm tape
It was cut into a width x 25 mm length, and the feel of the cut surface was organoleptically evaluated. A good film was represented by (○), a soft film without “waist” was represented by (soft), and a hard film was represented by (hard).

(9) Surface Roughness The center line average roughness (Ra) was evaluated using a surface roughness meter manufactured by Tokyo Seimitsu Co., Ltd. The cutoff value was 0.8 mm and the measurement length was 3 mm. Also, visually evaluate the appearance of the measurement surface,
Films with no matte and matte tone and good texture are expressed as (○), films with “some light” are expressed as (△), and films with large light are expressed as (x) did. In Examples 1 to 5, the surface on the upper layer side was measured. In Comparative Examples 1 to 3, the lower layer side, which is the surface to be physically embossed, was measured as a post-processing according to the prior art. Since Comparative Examples 4 to 7 are single-layer films, the surface in contact with the cooling roll, which is the side with more conspicuous irregularities, was measured.

[0045]

[Table 4]

[0046]

[Table 5]

[0047]

[Table 6]

[0048]

The film of the present invention contains a specific polyolefin-based thermoplastic elastomer to modify the surface into a satin finish, so that the mat-like film has higher productivity than physical processing methods such as embossing rolls. Is obtained. Further, when the film of the present invention is used as a base film for disposable diapers and adhesive tapes, it has a soft texture and an appropriate waist, strength, and tear strength that are easy to use when using tapes and the like, and during tape production. An adhesive tape excellent in processing suitability and running properties during diaper production can be obtained.
Furthermore, in a disposable diaper, when the tape is peeled off from the release tape (for protecting the adhesive surface) when the diaper is attached, a firm hand feeling without curling is given.

Claims (3)

[Claims] 1. An upper layer (A) containing polypropylene as a main component and containing a polyolefin-based thermoplastic elastomer.
And 1 selected from the group consisting of polyolefin-based thermoplastic elastomer, styrene-based thermoplastic elastomer, and linear low-density polyethylene having polypropylene as a main component.
1 selected from the group consisting of a polypropylene, a polyolefin-based thermoplastic elastomer and a styrene-based thermoplastic elastomer between the lower layer (C) containing at least one kind of resin.
A multilayer film provided with an intermediate layer (B) containing at least one kind of resin as a main component. 2. The polyolefin-based thermoplastic elastomer according to claim 1, wherein the polyolefin-based thermoplastic elastomer has polyethylene or polypropylene as a hard segment and ethylene-propylene rubber or ethylene-propylene-diene terpolymer as a soft segment. The multilayer film according to the above. 3. An upper layer (A) containing polypropylene as a main component and containing a polyolefin-based thermoplastic elastomer.
And 1 selected from the group consisting of polyolefin-based thermoplastic elastomer, styrene-based thermoplastic elastomer, and linear low-density polyethylene having polypropylene as a main component.
1 selected from the group consisting of a polypropylene, a polyolefin-based thermoplastic elastomer and a styrene-based thermoplastic elastomer between the lower layer (C) containing at least one kind of resin.
An adhesive tape having an adhesive layer (D) on a lower layer (C) side of a multilayer film provided with an intermediate layer (B) containing at least one or more kinds of resins as main components.